iphone - 为 UIButton 设置一个子类来处理外观

Question

我有一个 AuthButtons.h header :

#import <UIKit/UIKit.h>

@interface AuthButtons : UIButton

@property (nonatomic, weak) UIColor *backgroundColor;


@end

AuthButtons.m类的实现如下:

#import "AuthButtons.h"

@implementation AuthButtons

- (void)setBackgroundColor:(UIColor *)backgroundColor
{
    backgroundColor = [UIColor blueColor];
}

- (UIColor *)backgroundColor
{
    return [UIColor whiteColor];
}


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}

然后在我的 viewcontroller.m 类中我有:

@interface ViewController ()

@property (nonatomic, weak) AuthButtons *registerButton;


@end


...

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    _registerButton = [AuthButtons buttonWithType:UIButtonTypeSystem];
    [_registerButton setTitle:@"Register" forState:UIControlStateNormal];
    [_registerButton setBackgroundColor:[UIColor whiteColor]];
    _registerButton.frame = CGRectMake(0.0, 0.0, self.screenWidth / 2.0, 100.0);

    [_registerButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
}

当我尝试创建按钮时它总是崩溃。我错过了什么？

Answer 1

你的按钮很弱，没有添加为 subview ，所以它立即被释放